Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6637a08e7bdeb1…

MALICIOUS

PDF

44.1 KB Created: 2020-03-23 15:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 638920917adadf5a6cbdf7974f7d7ced SHA-1: 90833478fae7fb952a243e389ed66fb9d60d6f4d SHA-256: cc6637a08e7bdeb1ad0266ab685f1b127d71cefaf23aae09051c61acb450139a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO abuse tactic. The primary URL http://thewindowguys.info/uploads/1/3/0/7/130740260/130740260.html#que+es+el+sistema+de+evaluacion+del+desempe%C3%B1o is also part of this network. This pattern suggests the document is designed to drive traffic to these external resources, potentially for advertising, phishing, or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://thewindowguys.info/uploads/1/3/0/7/130740260/130740260.html#que+es+el+sistema+de+evaluacion+del+desempe%C3%B1o PDF link annotation
    • http://studiopartners.org/uploads/1/3/0/7/130739690/9bca096de.pdfIn PDF document text
    • http://babyak.net/uploads/1/3/0/4/130493816/618397.pdfIn PDF document text
    • http://freshfoodfusion.com/uploads/1/3/0/8/130814674/lizodilasa-mezixinomari-xapadiraxarolad.pdfIn PDF document text
    • http://www.louisswisspastry.com/uploads/1/3/0/6/130640111/7040167.pdfIn PDF document text
    • http://www.josephandarlene.com/uploads/1/3/0/8/130874354/jiwesigimin.pdfIn PDF document text
    • http://thespeechcrafter.com/uploads/1/3/0/6/130604046/sorosupefejenid.pdfIn PDF document text
    • http://harbergfamily.com/uploads/1/3/0/4/130489247/ledotapefokesuv.pdfIn PDF document text
    • http://thestashny.com/uploads/1/3/0/5/130551692/408063.pdfIn PDF document text
    • http://statementzine.com/uploads/1/3/0/8/130813378/dopawurimuxa.pdfIn PDF document text
    • http://furdude.com/uploads/1/3/0/3/130379117/vudekag-rakekebakegoj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 9376 bytes
SHA-256: a63f798c1b8b87c45e15ee5ea243f0be66b3fd13c0a447ba6b79b4b8c10b4c22

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